Speed changing and transmission gearing.



I. H. PLEUKHARP. SPEED CHANGING AND TRANSMISSION GEABING.

APPLICATION FILED 00T.3, 1905.

PATENTED JULY 3, 1906.

2'SHEETSSHBET 1.

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I. H. PLEUKHARP. SPEED CHANGING AND TRANSMISSION GEARING.

APPLICATION FILED 0(JT.3, 1905.

2 SHEETS-SHEET 2.

Attorney IV! 7 1V SSES v I I UNITED STATES PATENT oEEIoE.

- IRVI-N H. PLEUKHARP, or COLUMBUS, OHIO, ASSIGNOR TO THE DIRECT DRIVE AXLE COMPANY, or COLUMBUS, orno.

' SPEED CHANGING AND TRANSMISSION GEARING.

Patented July 3, 1906.

Application filed October 3,1905. Serial No. 281,141-

To all whom it may concern:

Be it known that I, IRvIN H. PLEUKHARP a resident of Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Im rovements in Speed Changing and Transmission Gearing;

V 5 and I do hereby declare the following to be a full, clear, and exact deseri .tion of the invention, such as enable ot ers skilled in the 1 artrto which it appertains to make and use the same.

' My invention relatesto improvements in speed chan g and transmission gearin e object o the invention being to provi e rs, improved gearing, connected directly to the dllVGD. shaft or axle by a clutch and not through the medium of difierential gearing, as heretofore; and the invention consists in certain novel features of construction and 2c combinations and arrangements of arts, as

be more fully hereinafter descri ed, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in section illustrating my improve- V 25 ments, and Fi 2 is a view insection' on the bus :2: a: theree 1 represents a shaft or axle to be driven,

in connection with which, when the axle constitutes the driven-axle of a motor-vehicle,

.3o any suitable mechanism ma be rovided at the wheel ends of the axle to compensate for the difference in speed when turning on a curve.

2. represents a high-speed forward-driving 35 gearhaving an elongated hub or hearing 3 mounted to turn on axle or shaft 1 and rovided with ball-bearings 4 around the ub between the same and an inwardl -project-- ing rin 5 in the gear-casing 6. A ow-speed o forwar -driving gear 7 is located around gear 2 and is made with a tubular hub or iournal 8, turning in roller-bearings 9 in a cyindrical portion or casin 10 are located back of the gear 7, as shown.

11 re resents the low-speed reversin -gear, which aces gear 7 and has a tubular ub or. bearin sleeve 12 on its rear face turning aroun atubular journal 13 on the casing 6, and ball-bearings 14'are located between this 5 tubular journal 13 and axle or shaft 1. The

casing 6, having a bearing-ring 14 therein, receives the back pressureon gear 11 and holds it up to its driving-pinion, hereinafter referred to..

A clutch 15 is keyed to slide on shaft or ax1e...l between the forward and reversing gfiand ball-bearingsgears and is made with teeth at both ends to engage with similar teeth or notches in gear 2 or gear '11 to lock either of said gears to the shaft or lie idle between them.

The hub 3 of gear 2 is rovided at intervals with recesses to receive ardened-steel pockets 16, and a hardened-steel ring 17 is located in the tubular hub or journal 8 of gear 7 and turns with the hub 8 around the hub 3. The inneror base walls of the pockets 16 are made in the form of cams or eccentrics, and rollers longitudinal movement by an internal flange 19 on ring 17. By this arrangement of roller ratchet mechanism a clutch is formed bethat when gear 7 is driven the action of ring 17 against rollers 18 will cause the latter to roll along the pockets 16 and wedge between gether; but when ear 2 is driven the rollers .will be moved to t e other ends of the pockets and gear 2 will turn without turning gear 7. r

A high-speed forward-drivin pinion 20 meshes with gear 2 and is secure upon short shaft 21, pro ecting outward into a tubular gear-casing 22, secured to main casing 6, and said shaft 21 has ball-bearing support at its shaft 21 and meshes with the low-speed forward-driving gear 7 and also with the lowspeed reverslng-gear 11 and this pinion 23 is made with anenlarged hub portion 24, haw ing ball-bearin mounting 25% the casing 22 to take the bac ward thrust of said pinion.

The drive-shaft 25, driven by any desired motor, projects into the tubular casing 22 and is sup orted imball-bearings 26 to hold the drive-shaft in alinement with the shaft 21, said drive-shaft 25 abutting against the end of shaft 21 and is provided with an annular shoulder 27, located against one of the ballbearing rings 26 to receive the backward thrust on high-speed pinion 20.

The inner end of drive-shaft 25 is made angular to slidingly key the outer hub portion of a clutch-sleeve 28 thereon, said clutchsleeve surrounding the outer ortion of shaft 21- and mounted to turn in ro ler-bearings 29 in tubular casing 22. This clutch-sleeve 28 is provided with clutch-teeth adapted to engage in notches 30 in the hub portion 24 of ow-speed pinion 23 or engage similar notches 31 in the enlarged end of shaft 21 or lie out of inner end, as shown. The low-speed driving-1 pinion 23 is mounted to turn freely about 1 18 are located in the pockets and held against tween gears 2 and 7, for it will be observed i thepockets and ring to lock gears 7 and 2 toengagement with either at a oint between them. An 0 erating-bar 32 for this clutch extends into t e casing 22 and carries a roller at its inner end located in an annular groove in the hub portion of the clutch-sleeve 28, and a spring-pressed locking-pin 33 is provided in the casing to enga e 1n any of a series of three notches 34 in t e bar 32 to lock the bar and clutch at any of the three adjustments.

The operation of myimprovements is as follows: With the arts in the positions shown it will be observed that as clutch 28 is not locked to either the pinion 23 o; shaft 21 the drive-shaft 25 will turn without transmitting motion to the axle. If it is desired to go forward, clutch 28 is moved to lock with pinion 23, and the clutch 15 is moved to lock gear'2 directly with the shaft or axle 1. Motion is then transmitted from drive-shaft 25 to clutch 28, to pinion 23, to gear 7, and through the medium of the rollers 18, acting as clutch devices, between ears 7 and 2, as abo re explalned. The sai gears 7 and 2 will act as one arge gear, which is connected directly to the shaft or axle by the clutch 15, and the axle will be driven forward at low speed. To reverse, clutch 15 is thrown into position to lock reversing-gear 11 directly to shaft or axle 1, and reverse motion is transmitted from pinion 23 to gear 11 to shaft or axle 1 to drive the latter in reverse direction at low speed. To attain highspeed, clutch 15 locks gear 2 directly to shaft or axle 1, and clutch 28 is locked to shaft 21, which compels highspeed pinion20 to turn gear 2, which latter rides freel within gear 7, as the rollers 18 will not lock t e gears 2 and 7 together when the gear 2 is turned.

It will be observed that my improved earin is connected directly with the sha t or ax e without the interposition of any=differential gearing, and by reason of this and other advantageous construction and arrangement of parts a very compact, stron easy-runnii1g, and easily-operated spee changing and reversing gearing is secured.

Having fully described my invention,'what I claim as new, and desire to secure by Letters Patent, is

1. .The combination with a gear-wheel, of a larger gear around the same, roller-ratchet mechanism connecting said gears, pinions meshing with the respective gears, and means for turning either of said pinions.

2. The combination with a gear-wheel, of a larger gear-wheel around the same, said gears provided with cylindrical hub IgOIlEIOIIS, roller-ratchet mechanism between t e hubs, and driving-pinions meshing with the respective gears.

3. The combination with a gear-wheelhaving a cylindrical hub on its rear face, of a larger gear around the smaller gear and provided with a cylindrical hub surrounding the hub of smaller gear, said smaller-gear hub having cam or eccentric pockets, rollers in said pockets moved by contact with the hub of the larger gear to lock the gears together, and means for turning either of; said gears.

4. The combination with a gear-wheel hav- .ing a cylindrical hub on its rear face, of a larger gear around the smaller gear and hav-- ing a hub surrounding the sma ler-gear hub, cam or eccentriepocketssupported in rec'esses in the smaller hub, rollers in said pockets, and a ring in the larger hubto move said rollers, and provided with an internal flange at one edge to hold the rollers against longitudinal movement;

5. r The. combination with an axle, of two forward-driving and one reversing ear turn ing freely. about the axle, a clutc to lock either the reversing or hi h-speed drivinggear drectly to the axle, an ratchet mechan 8 5 ism connecting the two forward-driving ars.

6. The combination with an axle, a nighspeed forward-driving gear and a low-speed reversin -gear, both turning freely about the axle and facing each other, a low-s end for-- ward-drivin gear around the high-speed gear, and r0 ler-ratchet mechanism connecting said forward-driving gears, of a clutch keyed to slide on the axle between the ears and constructed to lock either the speed or the reversing gear directly to the axle, a driving-pinion meshing with the highspeed gear, and anotherdriving-pinion meshing with both low-speed gears.

In testimony whereof I have signed this 10 specification in the presence of two subscriblngwitnesses.

I IRVIN HYPLEUKHARP, Witnesses: i

S. W. Fosrnn, -R. S. FERGUSON. 

